Gropper, G. L. (1991). Text displays: Analysis and systematic design. Educational Technology Publications.
芝加哥风格引文Gropper, George Leonard. Text Displays: Analysis and Systematic Design. Englewood Cliffs, N.J.: Educational Technology Publications, 1991.
MLA引文Gropper, George Leonard. Text Displays: Analysis and Systematic Design. Educational Technology Publications, 1991.
警告：这些引文格式不一定是100％准确.